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  • MESO: Mesoscale Discussion 2345

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Dec 25 13:01:06 2023
    ACUS11 KWNS 251301
    SWOMCD
    SPC MCD 251300=20
    IAZ000-MNZ000-NEZ000-SDZ000-NDZ000-251900-

    Mesoscale Discussion 2345
    NWS Storm Prediction Center Norman OK
    0700 AM CST Mon Dec 25 2023

    Areas affected...Eastern Nebraska...Far Western Iowa...Eastern South Dakota...Far Western Minnesota...Far Southeast North Dakota

    Concerning...Winter mixed precipitation=20

    Valid 251300Z - 251900Z

    SUMMARY...A mix of freezing rain and sleet will be likely this
    morning along a narrow corridor from far western Iowa northward into
    far western Minnesota. Moderate snow, with the possibility of
    localized heavy snow, will be likely from eastern Nebraska northward
    across much of east-central South Dakota.

    DISCUSSION...A mid-level low will steadily deepen across the central
    High Plains this morning, as a surface low moves northward across
    central Iowa. A distinct band of large-scale ascent is forecast to
    move around the northern periphery of the system, making conditions
    favorable for widespread winter precipitation. Surface temperatures
    will be in the upper 20s and lower 30s F from near Omaha, Nebraska
    northward to near Fargo, North Dakota. RAP forecast soundings along
    this corridor this morning have a warm layer near 850 mb, suggesting
    that precipitation will be mostly in the form of freezing rain, and
    possibly sleet. Freezing rain rates of one tenth of an inch per hour
    will be possible in some areas.

    Further west from northeast Nebraska northward across much of
    east-central South Dakota, forecast soundings show sub-freezing
    temperatures throughout the low levels. This will support moderate
    snow. As isentropic lift dramatically strengthens this morning,
    locally heavy snow will be possible in some areas. Snowfall rates
    could reach near one inch per hour within the heaviest of bands.

    ..Broyles.. 12/25/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-atBcwVz4MUxuGvw1TO5NIIHixnv9y4phcNLaVuTsfCZeaPHA32UgO1SSXFI1et-j8TNausB6= SK-UHtPMLriYuhR9H0$ for graphic product...

    ATTN...WFO...MPX...DMX...FGF...FSD...OAX...ABR...GID...BIS...
    LBF...

    LAT...LON 42069893 41459833 40979733 40909660 41059597 41249549
    41619522 42669541 43779580 44409603 45409619 46209610
    46769644 46869705 46469784 45749879 44899946 44299968
    43179945 42069893=20


    =3D =3D =3D
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